Myths and realities about UV rays



A suntan is healthy. A tan results from your body defending itself against further damage from UV radiation.
A tan protects you from the sun A dark tan on white skin offers only limited protection equivalent to an SPF of about 4.
You can’t get sunburnt on a cloudy day. Up to 80 % of solar UV radiation can penetrate light cloud cover. Haze in the atmosphere can even increase UV radiation exposure.
You can’t get sunburnt while in the water. Water offers only minimal protection from UV radiation, and reflections from water can enhance your UV radiation exposure.
UV radiation during the winter is not dangerous. UV radiation is generally lower during the winter months, but snow reflection can double your overall exposure, especially at high altitude. Pay particular attention in early spring when temperatures are low but the sun’s rays are unexpectedly strong.
Sunscreens protect me so I can get sunbathe much longer. Sunscreens should not be used to increase sun exposure time, but to increase protection during unavoidable exposure. The protection they afford depends critically on their correct application.
If you take regular breaks during sunbathing you won’t get sunburnt. UV radiation exposure is cumulative during the day.
If you don’t feel the hot rays of the sun you won’t get sunburnt. Sunburn is caused by UV radiation which cannot be felt. The heating effect is caused by the sun’s infrared radiation and not by UV radiation.

Source: World Health Organization